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2013 International Conference on Wireless Communications and Signal Processing最新文献

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Transmission mode switching for LTE-Advanced downlink multi-user MIMO systems LTE-Advanced下行链路多用户MIMO系统的传输模式切换
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677159
Xiaolong Yu, Shi Jin, Jue Wang
{"title":"Transmission mode switching for LTE-Advanced downlink multi-user MIMO systems","authors":"Xiaolong Yu, Shi Jin, Jue Wang","doi":"10.1109/WCSP.2013.6677159","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677159","url":null,"abstract":"To improve the performance of LTE-Advanced downlink systems, this paper investigates adaptive transmission mode switching between statistical and instantaneous channel state information (CSI) aided, single-user (SU) and multi-user (MU) transmissions. Theoretical studies show that the system performance will have a severe degradation when instantaneous CSI (ICSI) is inaccurate, especially for the MU transmission. In this light, we investigate the switching between ICSI-aided schemes and statistical CSI (SCSI) aided schemes based on achievable rate, which is related to both the channel correlation level, and the inaccuracy level of ICSI. After that, the cell average throughput is evaluated through system-level simulations. It's shown that the performance of SCSI-aided mode is as good as the corresponding ICSI-aided mode when the channel correlation is large enough, and SCSI varies slow and SCSI-aided schemes are more robust than ICSI-aided schemes. Therefore, SCSI-aided modes should be activated when the inaccuracy level of ICSI is high.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115078046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The demonstration of wireless access via visible light communications 通过可见光通信进行无线接入的演示
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677072
L. Ding, Fang Liu, Zhiqiang Yu, Yongjin Wang
{"title":"The demonstration of wireless access via visible light communications","authors":"L. Ding, Fang Liu, Zhiqiang Yu, Yongjin Wang","doi":"10.1109/WCSP.2013.6677072","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677072","url":null,"abstract":"Wireless data transmission via visible light has been significantly explored with the development of white-LED. In this paper, we report a wireless access system via visible light communication (VLC) technology. In our demonstration, the custom-made USB board serves as the transceiver consisting of a LED-based transmitter and a photodiode-based receiver. Two USB boards are connected to two computers respectively, constructing a communication system. One computer, or an ARM development board being linked to the network acts as a router enables computer to have access to Internet via the visible light channel. The prototype demonstrates a transmission data rate up to 460800 baud without packet loss at a distance of 30cm. A 0.3W white LED is used and a 10-6 bit error ratio (BER) is achieved. The eye diagram performance of the VLC system is presented as well as the packet loss of the visible light link.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132006724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
A new PSS design and identification for global coverage multi-beam S-LTE using generalized Zadoff-Chu sequences 基于广义Zadoff-Chu序列的全球覆盖多波束S-LTE PSS设计与辨识
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677043
Zhuming Deng, Haiming Wang, Mingkai Tang, Xiqi Gao, X. You
{"title":"A new PSS design and identification for global coverage multi-beam S-LTE using generalized Zadoff-Chu sequences","authors":"Zhuming Deng, Haiming Wang, Mingkai Tang, Xiqi Gao, X. You","doi":"10.1109/WCSP.2013.6677043","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677043","url":null,"abstract":"The original Zadoff-Chu sequences are firstly generalized to obtain more candidate sequences with good correlation properties for Primary Synchronization Signal (PSS) of LTE. Then, a new PSS sequence design method for global coverage multi-beam satellite LTE (S-LTE) using generalized Zadoff-Chu sequences is proposed. Furthermore, an efficient and low-complexity PSS identification algorithm is presented. Finally, simulation results show the effectiveness of the proposed scheme.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132301138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detection of primary user emulation attacks based on compressive sensing in cognitive radio networks 认知无线网络中基于压缩感知的主用户仿真攻击检测
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677144
Manman Dang, Zhifeng Zhao, Honggang Zhang
{"title":"Detection of primary user emulation attacks based on compressive sensing in cognitive radio networks","authors":"Manman Dang, Zhifeng Zhao, Honggang Zhang","doi":"10.1109/WCSP.2013.6677144","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677144","url":null,"abstract":"In this paper, we introduce the idea of compressive sensing (CS) into primary user emulation attack (PUEA) detection in cognitive radio networks. We can distinguish whether the signal transmitters are primary users or PUEAs by obtaining the locations of transmitters through processing the received signal strength (RSS) readings. Since the RSS has redundancy in spatial domain, we employ CS theory to save the number of measurement sensors and messages need to be collected. Additionally, the number of measurements is dominated by the number of PUEA being sensed, the conventional algorithms with fixed measurement number have poor performances in physical situations where number of PUEA is unknown and changing. So, we propose an adaptive orthogonal matching pursuit algorithm (AOMP) to adapt to the changing cases of PUEA. Simulation results show that the location reconstruction of changing PUEA by AOMP algorithm outperforms traditional OMP algorithm with better accuracy. As a result, the channel utilization can be greatly improved.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132815393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Multi-sector joint beamforming for pilot coverage optimization 导频覆盖优化的多扇区联合波束形成
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677137
Dongdong Fan, Zhouyun Wu, Aiping Huang, Hangguan Shan, H. Zhuang
{"title":"Multi-sector joint beamforming for pilot coverage optimization","authors":"Dongdong Fan, Zhouyun Wu, Aiping Huang, Hangguan Shan, H. Zhuang","doi":"10.1109/WCSP.2013.6677137","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677137","url":null,"abstract":"Coverage optimization is an important task which directly affects the performance of cellular networks. The signal-to-interference and noise ratio (SINR) is a key metrics for evaluating coverage effect and its ability of resisting radio propagation condition variation. It is difficult to improve the ability of the pilot coverage of multiple sectors to resist environment variation simultaneously by using the existing methods. In this paper, a novel coverage optimization method based on multi-sector joint beamforming is proposed to maximize the minimum SINR of the sectors. An iterative algorithm is then developed to obtain antenna array excitation weights. Simulation results show that the performance of our algorithm is superior to that of the existing algorithm.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel load balancing scheme in LTE and WiFi coexisted network for OFDMA system 在LTE和WiFi共存的OFDMA网络中提出了一种新的负载均衡方案
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677253
Zunli Yang, Qinghai Yang, Fenglin Fu, K. Kwak
{"title":"A novel load balancing scheme in LTE and WiFi coexisted network for OFDMA system","authors":"Zunli Yang, Qinghai Yang, Fenglin Fu, K. Kwak","doi":"10.1109/WCSP.2013.6677253","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677253","url":null,"abstract":"In this paper, a novel load balancing scheme is conceived for the OFDMA LTE cellular and WiFi coexisted network. The mobile index is introduced to measure the mobility of user equipments (UE) in the coverage of WiFi hotspots and the access index is calculated by considering both mobile index and the received power from WiFi access points (AP) to determine the UE's access pattern. The load balance entity manages the UE load in coexistent network dynamically. A load balancing algorithm is developed to balance the network load measured by the ratio of the average WiFi load to the LTE cell load as well as the Jain's fairness index. Simulation results demonstrate the proposed algorithm can acquire an improvement in network load balancing, thus enhancing the overall system throughput.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134113425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Multichannel blind deconvolution of complex I/Q independent sources with phase recovery 具有相位恢复的复I/Q独立源的多通道盲反卷积
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677166
Fang-lin Gu, Hang Zhang, Yi Xiao
{"title":"Multichannel blind deconvolution of complex I/Q independent sources with phase recovery","authors":"Fang-lin Gu, Hang Zhang, Yi Xiao","doi":"10.1109/WCSP.2013.6677166","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677166","url":null,"abstract":"Multichannel blind deconvolution (MBD) techniques allow recovery of individual source signals from observed mixtures, exploiting only the assumption of mutual independence of sources. Generally, complex signals are recovered with an arbitrary phase rotation. In this paper, we propose two constrained MBD algorithms to separate complex sources and remove the phase ambiguities simultaneously when the sources have independent in-phase and quadrature (I/Q) components. The algorithms apply the MBD techniques to real-valued signals, which are composed by the real and imaginary parts of the complex-valued sources, and impose constraint on the structure of separating filter to avoid the so-called I/Q associated problem. Simulation results demonstrate that the proposed algorithms are effective in recovering source phases without affecting source separation.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133782337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Enhanced data detection in OFDM systems using factor graph 利用因子图增强OFDM系统的数据检测
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677025
Jinda Yang, Qinghua Guo, D. Huang, S. Nordholm
{"title":"Enhanced data detection in OFDM systems using factor graph","authors":"Jinda Yang, Qinghua Guo, D. Huang, S. Nordholm","doi":"10.1109/WCSP.2013.6677025","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677025","url":null,"abstract":"In OFDM systems, the cyclic prefix (CP) eliminates the interblock interference and enables the use of the computationally efficient single-tap equalizers at the receiver. While posing a loss in both spectrum efficiency and power efficiency, the CP brings extra information about the data which can be used for detection. Therefore, instead of discarding the CP as in the conventional OFDM systems, this paper takes advantage of the prefix redundancy and utilizes it in the soft-input soft-output equalizer of a turbo equalization system. By using factor graph, an equalization algorithm is developed, and with proper approximation, the complexity of the proposed algorithm is reduced to O(2Rlog2N + 4RG/N log2G + 2RG/N) per data symbol for R iterations, where N is the length of the block and G is equal to P + L - 1 with P the CP length and L the channel length. Simulation results show that the turbo equalization system converges within two iterations and the proposed equalization approach achieves significant gain compared to the conventional approach.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132960607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Closely spaced multipath mitigation in GNSS receiver based on maximum likelihood estimation 基于最大似然估计的GNSS接收机紧密间隔多径缓解
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677035
Gao Yan, Li Qing
{"title":"Closely spaced multipath mitigation in GNSS receiver based on maximum likelihood estimation","authors":"Gao Yan, Li Qing","doi":"10.1109/WCSP.2013.6677035","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677035","url":null,"abstract":"Multipath is the dominant source of positioning error in modern GNSS receiver. Maximum likelihood (ML) parameter estimation is an optimal method to mitigate the multipath effects while ML involves nonlinear optimization and requires iterative algorithms. Iterative methods usually lack of global convergence when the paths are closely spaced, if the initial value is arbitrarily assigned. In this paper, however, we first employ a grid search method to choose the initial value before iteration. Most computation of the grid search can be done offline. After that, an iterative method with simple forms is used to improve the parameter accuracy and global convergence can be achieved with just a few iterations. The simulations results show the estimator of time delay is almost unbiased when the time relative delay of two paths is larger than 0.20 chips.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"28 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126111587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Compressed sensing enabled narrowband interference mitigation for IR-UWB systems 压缩感知实现了IR-UWB系统的窄带干扰缓解
2013 International Conference on Wireless Communications and Signal Processing Pub Date : 2013-12-02 DOI: 10.1109/WCSP.2013.6677177
N. Chen, Shaohua Wu, Yunhe Li, Bin Cao
{"title":"Compressed sensing enabled narrowband interference mitigation for IR-UWB systems","authors":"N. Chen, Shaohua Wu, Yunhe Li, Bin Cao","doi":"10.1109/WCSP.2013.6677177","DOIUrl":"https://doi.org/10.1109/WCSP.2013.6677177","url":null,"abstract":"Compressed sensing (CS) is an emerging theory that enables the reconstruction of sparse signals from a small set of random measurements. Because of the sparsity of impulse radio ultra-wideband (IR-UWB) signals in the time domain, CS makes it possible to operate at sub-Nyquist rates for IR-UWB communications where Nyquist sampling represents a formidable challenge. However, strong narrowband interference (NBI) still seriously affects the system. In this paper, by observing that the NBI signal is approximately sparse in the discrete Fourier transform (DFT) domain, a novel NBI estimation and mitigation scheme is proposed. By estimating the subspace of NBI and then feeding back the NBI nullspace, a compressive measurement matrix is designed to mitigate the NBI effectively while collecting useful signal energy. Theoretical analysis and simulation results show that NBI can be effectively mitigated using sub-Nyquist samples of a received signal in the IR-UWB communication system based on CS.","PeriodicalId":342639,"journal":{"name":"2013 International Conference on Wireless Communications and Signal Processing","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125158410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
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